German DESCH coupling, DESCH model, DESCH price

DESCH couplings consist of components such as an internal gear ring and a flanged half-coupling with external teeth, both having the same number of teeth. External teeth are available in two profiles: straight teeth and crowned teeth. Crowned teeth refer to external teeth machined into a spherical surface, with the sphere's center on the gear axis. The backlash is larger than that of standard gears. Crowned tooth couplings allow greater angular misalignment (compared to straight-tooth couplings), improve tooth contact conditions, increase torque transmission capacity, and extend service life. During operation of gear couplings, relative displacement occurs between the two shafts, causing periodic axial relative sliding between the internal and external tooth surfaces, which inevitably leads to tooth surface wear and power loss. Therefore, gear couplings must operate under good lubrication and sealing conditions.

DESCH Coupling Introduction

Using just one mechanical torque limiter can quickly disconnect the motor from the main spindle, thereby eliminating the destructive effects of inertial forces. For ordinary machinery, including conveyor drives, office machines, and various instruments, mechanical torque limiters such as shear-pin safety couplings and friction clutches provide good safety protection. However, they still cannot meet the requirements of high-performance equipment such as machine tools. One problem faced is that ordinary clutches and couplings transmit both torque and misalignment to the protected shaft. In special applications, there are other issues as well. However, the safety coupling is a new type of mechanical torque limiter that overcomes these traditional problems. Safety couplings are best suited for protecting high-speed, high-precision drive systems from overload damage. This coupling is not merely a refined version of ordinary torque limiters, but a product specifically designed in cooperation with machine tool manufacturers to meet certain specific requirements. The price of protection devices with safety couplings is also relatively low. When equipping machining centers with this protection device, each axis generally costs 750 USD.

DESCH Coupling Features

All safety couplings have the following characteristics: 1) No backlash in keyless shaft-hub connections; 2) High torsional stiffness, very low moment of inertia, compact size, and adjustable disengagement torque; 3) Original position is maintained after re-engagement; 4) Alarm capability during overload; 5) Available in automatic and non-automatic re-engagement versions, with heat resistance (above 260 °C). In addition, certain types of safety couplings can compensate for axial, radial, and angular shaft misalignments. Some models feature integrated ball bearings for pulleys and sprockets. These characteristics make safety couplings suitable not only for machine tool drives but also for high-performance assembly lines, printing machinery, packaging machinery, etc. The internally expanding friction safety coupling is a structural type of friction safety coupling. It uses two cylindrical helical springs to press arched friction plates against an intermediate ring, generating friction between the plates. The magnitude of this friction determines the coupling's slip torque. The slip torque is adjusted by replacing the springs. When the transmitted torque exceeds the slip torque of the Stieber coupling, slippage occurs between the driving and driven sides; when the transmitted torque is below the slip torque, there is no relative sliding between the two sides, and normal operation is automatically restored. Under normal operating conditions within the specified range, component replacement is generally not required. With proper use of the AMN type internally expanding friction safety coupling, impact loads during start-up of the shafting transmission can be effectively partially reduced, enabling uniform acceleration of the machine, while preventing motor burnout due to overload. It is suitable for applications requiring overload safety protection to avoid damage to critical components. The internally expanding friction safety coupling is a type of flexible safety coupling with elastic elements. It connects two halves of a Stieber coupling with a double-row roller chain. Relative sliding can occur between the sprocket and the friction plates, providing safety protection. The torque is determined by the compression of the disc springs. It is suitable for connecting transmission shaft systems with coaxial or parallel axes and has certain compensation capabilities for relative misalignment between the two shafts, limiting torque and providing overload protection.

DESCH Coupling Applications

The features and applications of safety couplings are analyzed as follows: 1) Wide torque control range and high control precision. Torque is proportional to the excitation current over a wide range, allowing complete and simplified control of transmitted torque, making it suitable as a linear regulation element. 2) Constant torque characteristic: torque depends solely on the magnitude of the excitation current and is independent of the relative speed between the driving and driven sides. It has a fixed torque characteristic, with static torque equal to dynamic torque. 3) Capable of transmitting a certain torque regardless of slip, without shock, vibration, or noise. Operation is smooth, making it suitable for high-frequency operating conditions. 4) Low power consumption and low control power. Residual torque is minimal when excitation current is disconnected, offering good disengagement performance. No heating occurs during idling. Torque stability is good, suitable for precise control. 5) Simple structure, small volume, and light weight. The magnetic powder is dry and oil-free, making maintenance easy. The magnetic powder has good oxidation resistance, heat resistance, long service life, and high reliability. By fixing the driven part, the torque becomes a braking torque on the rotating part, forming a magnetic powder coupling, which can also serve as a magnetic powder load brake.

Weidou Intelligent Technology specializes in selling German DESCH rigid couplings, DESCH flexible couplings, DESCH safety couplings, DESCH universal joints, DESCH diaphragm couplings, DESCH jaw couplings, DESCH flange couplings, DESCH cross-slide couplings, DESCH slider couplings, DESCH gear couplings, DESCH tire couplings, DESCH elastic couplings, DESCH bellows couplings, DESCH roller chain couplings, DESCH spring couplings, all original imports from Germany. Customers are welcome to inquire and order.